I can read music. Used to be a lot better at it; seems like for the past half dozen years or so all the gigs I've been doing have been with rock bands that don't use charts or free-improv jazz combos, so my reading's a lot rustier than it was in the 80's & 90's when I was freelancing, playing commercial sessions and musical theater shows, GB gigs, lots of avant-jazz/chamber music. But I'll go on a sight-reading gig without hesitation
...which is not the same as saying "without trepidation" !
Oh yeah, semantic quibble: Can anyone really "read" tab? I mean, are there people that see so much of it that you can throw a tablulature transcription in front of them and they can play it down cold? having never heard the part before? Does tab even convey all the info you would need to be able to play a part down cold having never heard it before?